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U.S.S. Wire Gauge - scaled Prototype to O, S, HO, N, Z U.S. Steel Wire Gage, also called National Wire Gage (N.W.G.), Washburn and Moen --Gage (W.G.) etc. Used exclusively for steel. For non-ferrous metals, see American Wire Gage, also called Brown and Sharpe Wire Gage (B. & S.). Used...